Attachment for a game machine



FIG. 1 is front, top and right perspective view of an attachment for a game machine showing our new design;

FIG. 2 is rear, bottom and left perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof, a right side view being a mirror image thereof; and,

FIG. 8 is a perspective view thereof, showing the attachment for a game machine in it's environmental use. The broken lines showing of a game machine is for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an attachment for a game machine, as shown and described. 